# Square Panda Letter Lullaby vs Osmo Shape Builder

The clearest difference is rating: Square Panda Letter Lullaby at 3.2 against Osmo Shape Builder's 2.3. Square Panda Letter Lullaby also leads on in-app purchases (none vs 2) and iOS requirement (8.0 vs 15.0). Osmo Shape Builder's advantage is ratings volume (86 vs 10). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. Osmo Shape Builder sells 2 one-off in-app purchases. Square Panda Letter Lullaby asks for nothing beyond the download.

Square Panda Letter Lullaby holds the better App Store score, 3.2 against 2.3. That said, the two scores are not equally well evidenced: Osmo Shape Builder has 86 ratings behind it against 10, so its average is the more settled of the two. Written reviews split almost evenly too, at 0% and 0% positive.

Square Panda Letter Lullaby ships an update every 2 months, Osmo Shape Builder every 3 months. The most recent releases landed on October 2, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Square Panda Letter Lullaby | Osmo Shape Builder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.2 (10 ratings)](https://appshunter.io/ios/app/square-panda-letter-lullaby/id1157733021/reviews)** | [2.3 (86 ratings)](https://appshunter.io/ios/app/osmo-shape-builder/id1492331208/reviews) |
| Number of ratings | 10 | **86** |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 263 MB | 322 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Square Panda Inc.](https://appshunter.io/developer/1088414097) | [Tangible Play](https://appshunter.io/developer/799157444) |

## What reviewers say

### Square Panda Letter Lullaby

[App page](https://appshunter.io/ios/app/square-panda-letter-lullaby/id1157733021)

Children create their own alphabet songs by arranging letters, experiencing tactile reinforcement and multi-sensory engagement. This app offers two modes: one for song creation and another for reviewing new words learned, bringing their unique lullabies to life.

**Highlights:** Customizable alphabet songs, Tactile letter reinforcement, Multi-sensory learning, Word review mode, Phonics and vocabulary building, Contextual word reinforcement with pictures

**Features:** macOS Compatibility

**In-app purchases:** none


### Osmo Shape Builder

[App page](https://appshunter.io/ios/app/osmo-shape-builder/id1492331208)

This app helps young children learn basic geometric shapes through interactive play. It progresses from identifying shapes to creating them, fostering a love for learning and turning screen time into an educational experience.

**Highlights:** Learn basic geometric shapes, Compose and create shapes, Identify and describe shapes, Color recognition, Hands-on learning system, Inspires love of learning

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3-day trial of Shape Builder | Free | one-time |
| Unlock Shape Builder | $24.99 | one-time |


## Frequently asked questions

### Is Square Panda Letter Lullaby free?

Square Panda Letter Lullaby is free to download, with no in-app purchases.

### Is Osmo Shape Builder free?

Osmo Shape Builder is free to download, with in-app purchases available.

### Which has better reviews, Square Panda Letter Lullaby or Osmo Shape Builder?

Square Panda Letter Lullaby is rated higher. Square Panda Letter Lullaby averages 3.2 out of 5 from 10 ratings, while Osmo Shape Builder averages 2.3 from 86 ratings.

### Do Square Panda Letter Lullaby or Osmo Shape Builder have ads?

Neither Square Panda Letter Lullaby nor Osmo Shape Builder shows ads.

### Which is updated more often, Square Panda Letter Lullaby or Osmo Shape Builder?

Square Panda Letter Lullaby ships an update every 2 months, and Osmo Shape Builder every 3 months. Most recently, Square Panda Letter Lullaby was updated on October 2, 2026 and Osmo Shape Builder on October 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*